Muscle Contraction

__________ is attached to the Z line?

• myosin

• actin

• thick filament

• troponin

What is the contractile unit formed from Z line to Z line?

• Sarcomere

• T Tubule

• Sarcoplasmic reticulum

• Fascicle

____________ attaches to actin to form the cross bridge.

• Troponin

• Tropomyosin

• Myosin

• Calcium

What does calcium attach in a muscle contraction?

• Myosin

• Tropomyosin

• Troponin

• Actin

What is released from the sarcoplasmic reticulum?

• Inorganic phosphate

• ADP

• Calcium

• ATP

What is the name of the neurotransmitter released at a neuromuscular junction?

• Calcium

• Acetylcholine

• Dopamine

• Troponin

A mitochondria's role in muscle contraction is the production of...

• Synthesis of ATP
• Metabolism of ATP
• Synthesis of Proteins
• Metabolism of Worn out Proteins

The _____ of a cell would be responsible for synthesis of the myofibril proteins.

• Mitochondria and Leukoplasts
• Ribosomes and Golgi Apparatus
• Rough and Smooth ERs
• Nucleus and Mitochondria

Which is more true to cause muscle contraction?

• Actin Pulls on the myosin
• Myosin Pulls on the Titin
• Myosin Pulls on Actin
• Actin Pulls on Titin

Which ion, when present, changes the conformation of tropomyosin?

• Calcium
• Sodium
• Potassium
• Lithium